#sc{ position: absolute; overflow: hidden;  width: 740px; height:500px; background-color:#fff;  }
	#sa{position: absolute; width:100%; height:8px; background-color:#aaa; }
		.scroller{position: absolute; height: 100%; background-color:#888;}
	#mb{position: absolute; width: 5600px; height:492px; font-size:20px; background-color:#ddd;}
		#mb div{float:left; width: 280px; height: 100%; text-align:center; line-height: 400px;}